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语法高亮，滚动条美化，设置页面调整

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10
docs/javascript/Reference/Global_Objects/Object/getOwnPropertyDescriptors.html
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<div></div>
<p><code><strong>Object.getOwnPropertyDescriptors()</strong></code> 方法用来获取一个对象的所有自身属性的描述符。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">Object.getOwnPropertyDescriptors(<var>obj</var>)</pre>
<pre><code class="language-javascript">Object.getOwnPropertyDescriptors(<var>obj</var>)</code></pre>
<h3 id="参数">参数</h3>
<dl>
<dt><code>obj</code></dt>
@@ -15,21 +15,21 @@
<h2 id="示例">示例</h2>
<h3 id="浅拷贝一个对象">浅拷贝一个对象</h3>
<p><a href="Reference/Global_Objects/Object/assign" title="Object.assign() 方法用于将所有可枚举属性的值从一个或多个源对象复制到目标对象。它将返回目标对象。"><code>Object.assign()</code></a> 方法只能拷贝源对象的可枚举的自身属性，同时拷贝时无法拷贝属性的特性们，而且访问器属性会被转换成数据属性，也无法拷贝源对象的原型，该方法配合 <a href="Reference/Global_Objects/Object/create" title="Object.create()方法创建一个新对象，使用现有的对象来提供新创建的对象的__proto__。 （请打开浏览器控制台以查看运行结果。）"><code>Object.create()</code></a> 方法可以实现上面说的这些。</p>
<pre class="brush: js">Object.create(
<pre><code class="language-javascript">Object.create(
Object.getPrototypeOf(obj),
Object.getOwnPropertyDescriptors(obj)
);
</pre>
</code></pre>
<h3 id="创建子类">创建子类</h3>
<p>创建子类的典型方法是定义子类，将其原型设置为超类的实例，然后在该实例上定义属性。这么写很不优雅，特别是对于 getters 和 setter 而言。 相反，您可以使用此代码设置原型：</p>
<pre class="brush: js line-numbers language-js"><code class="language-js"><span class="keyword token">function</span> <span class="function token">superclass</span><span class="punctuation token">(</span><span class="punctuation token">)</span> <span class="punctuation token">{</span><span class="punctuation token">}</span>
<pre><code class="language-javascript"><code class="language-js"><span class="keyword token">function</span> <span class="function token">superclass</span><span class="punctuation token">(</span><span class="punctuation token">)</span> <span class="punctuation token">{</span><span class="punctuation token">}</span>
superclass<span class="punctuation token">.</span>prototype <span class="operator token">=</span> <span class="punctuation token">{</span>
<span class="comment token">// 在这里定义方法和属性</span>
<span class="punctuation token">}</span><span class="punctuation token">;</span>
<span class="keyword token">function</span> <span class="function token">subclass</span><span class="punctuation token">(</span><span class="punctuation token">)</span> <span class="punctuation token">{</span><span class="punctuation token">}</span>
subclass<span class="punctuation token">.</span>prototype <span class="operator token">=</span> Object<span class="punctuation token">.</span><span class="function token">create</span><span class="punctuation token">(</span>superclass<span class="punctuation token">.</span>prototype<span class="punctuation token">,</span> Object<span class="punctuation token">.</span><span class="function token">getOwnPropertyDescriptors</span><span class="punctuation token">(</span><span class="punctuation token">{</span>
<span class="comment token">// 在这里定义方法和属性</span>
<span class="punctuation token">}</span><span class="punctuation token">)</span><span class="punctuation token">)</span><span class="punctuation token">;</span></code></pre>
<span class="punctuation token">}</span><span class="punctuation token">)</span><span class="punctuation token">)</span><span class="punctuation token">;</span></code></code></pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>